<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
    <title>webview-demo</title>
    <style type="text/css">
      .btn {
        display: block;
        margin: 20px auto;
        padding: 5px;
        background-color: #007aff;
        border: 0;
        color: #ffffff;
        height: 40px;
        width: 200px;
      }

      .btn-red {
        background-color: #dd524d;
      }

      .btn-yellow {
        background-color: #f0ad4e;
      }

      .desc {
        padding: 10px;
        color: #999999;
      }

      .post-message-section {
        visibility: hidden;
      }
    </style>
  </head>
  <body>
    <p class="desc">web-view 组件加载网络 html 示例。点击下列按钮，跳转至其它页面。</p>
    <div class="btn-list">
      <button class="btn" type="button" data-action="navigateTo">navigateTo</button>
      <button class="btn" type="button" data-action="redirectTo">redirectTo</button>
      <button class="btn" type="button" data-action="navigateBack">navigateBack</button>
      <button class="btn" type="button" data-action="reLaunch">reLaunch</button>
      <button class="btn" type="button" data-action="switchTab">switchTab</button>
    </div>
    <div class="post-message-section">
      <p class="desc">网页向应用发送消息，注意：小程序端应用会在此页面后退时接收到消息。</p>
      <div class="btn-list">
        <button class="btn btn-red" type="button" id="postMessage">postMessage</button>
      </div>
    </div>
    <script type="text/javascript">
      var userAgent = navigator.userAgent;
      if (userAgent.indexOf('AlipayClient') > -1) {
        // 支付宝小程序的 JS-SDK 防止 404 需要动态加载，如果不需要兼容支付宝小程序，则无需引用此 JS 文件。
        document.writeln('<script src="https://appx/web-view.min.js"' + '>' + '<' + '/' + 'script>');
      } else if (/QQ/i.test(userAgent) && /miniProgram/i.test(userAgent)) {
        // QQ 小程序
        document.write(
          '<script type="text/javascript" src="https://qqq.gtimg.cn/miniprogram/webview_jssdk/qqjssdk-1.0.0.js"><\/script>'
        );
      } else if (/miniProgram/i.test(userAgent) && /micromessenger/i.test(userAgent)) {
        // 微信小程序 JS-SDK 如果不需要兼容微信小程序，则无需引用此 JS 文件。
        document.write('<script type="text/javascript" src="https://res.wx.qq.com/open/js/jweixin-1.4.0.js"><\/script>');
      } else if (/toutiaomicroapp/i.test(userAgent)) {
        // 头条小程序 JS-SDK 如果不需要兼容头条小程序，则无需引用此 JS 文件。
        document.write(
          '<script type="text/javascript" src="https://s3.pstatp.com/toutiao/tmajssdk/jssdk-1.0.1.js"><\/script>');
      } else if (/swan/i.test(userAgent)) {
        // 百度小程序 JS-SDK 如果不需要兼容百度小程序，则无需引用此 JS 文件。
        document.write(
          '<script type="text/javascript" src="https://b.bdstatic.com/searchbox/icms/searchbox/js/swan-2.0.18.js"><\/script>'
        );
      } else if (/quickapp/i.test(userAgent)) {
        // quickapp
        document.write('<script type="text/javascript" src="https://quickapp/jssdk.webview.min.js"><\/script>');
      }
      if (!/toutiaomicroapp/i.test(userAgent)) {
        document.querySelector('.post-message-section').style.visibility = 'visible';
      }
    </script>
    <!-- uni 的 SDK -->
    <!-- 需要把 uni.webview.1.5.5.js 下载到自己的服务器 -->
    <script type="text/javascript" src="https://gitcode.net/dcloud/hello-uni-app-x/-/blob/alpha/hybrid/html/uni.webview.1.5.5.js"></script>
    <script type="text/javascript">
      // 待触发 `UniAppJSBridgeReady` 事件后，即可调用 uni 的 API。
      document.addEventListener('UniAppJSBridgeReady', function() {
        uni.postMessage({
            data: {
                action: 'message'
            }
        });
        uni.getEnv(function(res) {
            console.log('当前环境：' + JSON.stringify(res));
        });

        document.querySelector('.btn-list').addEventListener('click', function(evt) {
          var target = evt.target;
          if (target.tagName === 'BUTTON') {
            var action = target.getAttribute('data-action');
            switch (action) {
              case 'switchTab':
                uni.switchTab({
                  url: '/pages/tabBar/API/API'
                });
                break;
              case 'reLaunch':
                uni.reLaunch({
                  url: '/pages/tabBar/component/component'
                });
                break;
              case 'navigateBack':
                uni.navigateBack({
                  delta: 1
                });
                break;
              default:
                uni[action]({
                  url: '/pages/component/button/button'
                });
                break;
            }
          }
        });
        document.getElementById('postMessage').addEventListener('click', function() {
          uni.postMessage({
            data: {
              action: 'message'
            }
          });
        });
      });
    </script>
  </body>
</html>